Let's call an infinite sequence of bits $f:N\rightarrow \{0,1\}$ *absolutely random* if any computably constructed subsequence is not computable, i.e. there aren't monotonic computable function $g:N \rightarrow N$ and computable function $h:N \rightarrow \{0,1\}$ such that $\forall n ~f(g(n)) = h(n)$. Is it known definition? I'm sure it's not the same as Martin-Löf randomness, because Chaitin's constant is not absolutely random (we can construct infinite computable sequence of programs that are halting) How to prove that such function exists (or it's not)?